Stackable Shelves made for Lee (and possibly other) reloading dies. I glued them together, that's not required. I also added rubber feet on the bottom shelf to keep it from moving. I used small square tabs that fit into the shelf above. These tabs provides centering , will keep it together if you don't want to glue, and more surface area for glue if you do want to glue. Hole on bottom is 3x3mm, tabs are 2.8x2.8mm. Testing found that worked best assuming you have appropriate 1st layer height.

Note that for the top shelf the holes are shallow (because I didn't want the holes all the way through the shelf). The shelf is 3mm thick, the holes are 2mm, while the tabs are 5mm high so you will need to snip off the majority (~3mm) of the skinny square tab on the shelf below the top. Don't snip off all, they still providing centering support.

Will fit items:
127mm (w) x 42mm (h) x 142mm (d)

CR-10 SE

Creality

No

No

.2

25%

I used PETG, never tested with PLA